Hoisting tackle



0. J. BOETT CHER. HOISTING TACKLE. APPLICATION FILED 050.9, 1921.

Patented July 11, 1922.

OTTO JOHN BOET'ICHER, OF CHILTON, WISCONSIN, ASSIGNOR 0]? TWO-FIFTHS TOFRED W. MAAS AND ONE-FIFTH TO GEO. C. HUME, BOTH 01" CHILTON, WISCONSIN.

HOISTING TACKLE.

Application filed December 9, 1921.

T0 alZ whom it may concern:

Be it known that I, OTTO J. BoETroHER, a citizen of the United States,residing at Chilton, in the county of Calumet and State of Wisconsin,have invented certain new and useful Improvements in Hoisting Tackle, ofwhich the following is a specification.

This invention relates to hoisting tackle in which pulley blocks areused to obtain the necessary power; and it consists in the novelconstruction and combination of the parts hereinafter fully describedand claimed which enable fiat straps or bands to be used in place of theropes or chains ordinarily used.

In the drawings, Figure 1 is a side view of a hoisting tackleconstructed according to this invention. Fig. 2 is a view showing thedevices turned around one-quarter from the position shown in Fig. 1.Fig. 3 is a detail side view of the automatic catch. Fig. 4 is a frontview of the same.

The upper block 6 has two parallel side plates 7, and a suspension hook8. A fiat leather strap 9 is used in place of the usual rope or chain,and fiat bands of other flexible material may also be used. One end ofthe strap 9 is secured to a crossbar 10, on the upper block, and aroller 12 is journaled on a pin 14 in the upper block for the strap topass over.

The lower block 15 has side plates 16, and a roller 17 is journaled on apin 18 between the side plates, for the strap to pass under. The block15 has a lifting hook 19 pivoted on a pin 20 at its lower part, and thishook is preferably a snap hook.

A catch roller 21 of larger diameter than the roller 17, so that thestretches of the strap will not run against each other, is journaled ona pin 22, and is arranged between the roller 17 and the lifting hook,and an automatic catch 24 is pivoted on the pin 20. This catch 24 is acam provided with a serrated outer surface, and it is pivoted to the pinby a double-eye 25 which straddles the eye of the lifting hook.

Specification of Letters Patent.

Patented July 11, 1922.

Serial No. 521,180.

The strap 9 passes downwardly from the cross bar 10 under the roller 17,thence up and over the roller 12, and downwardly be tween the catchroller 21 and the catch 24.

When the fall 26 is held in the position shown, parallel to the pull ofthe load, and is slackened, the cam-shaped catch is turned on its pivotpin by contact with the strap, so that the strap is gripped between thecatch and the catch roller.

This tackle is specially adapted for use by linemen in making repairs ontelephone and other electric lines, and is used to pull up the wires.The automatic catch enables the lineman to hold the wire under anydesired tension in making repairs.

The strap is released by first pulling the fall 26 a little downwardly,when the tackle is in the position shown in Fig. 1, so as to turn thecatch on its pivot; and then bending the fall upwardly around theperiphery of the roller 21, without letting the strap slide backwardly,until the fall is clear of the catch.

VYhat I claim is:

A tackle, comprising a block having a flat-faced roller journaled in it,a second block having two flat-faced rollers arranged tandem andjournaled in it, a cam-shaped sustaining catch provided with adouble-eye which is pivoted in the second block in line with its tworollers, a lifting member pivoted between the two eyes of the saiddouble-eye, said catch and lifting member being mounted on the samepivot and being independently movable, and a flat operating strap whichengages with the said catch and passes over the said. rollers and issecured at one end to the first said block, said catch operating toclamp the strap against one of the rollers of the said second block.

In testimony whereof I have aflixed my signature.

OTTO JOHN BOETTOHER.

